Free will is generally understood as the capacity or ability of people to (a) choose between different possible courses of action, (b) exercise control over their actions in a way that is necessary for moral responsibility, or (c) be the ultimate source or originator of their actions. There are different theories as to its nature, and these aspects are often emphasized differently depending on philosophical tradition, with debates focusing on whether and how such freedom can coexist with physical determinism, divine foreknowledge, and other constraints.
Free will is closely linked to the concepts of moral responsibility and moral desert, praise, culpability, and other judgements that can logically apply only to actions that are freely chosen. It is also connected with the concepts of advice, persuasion, deliberation, and prohibition. Traditionally, only actions that are freely willed are seen as deserving credit or blame. Whether free will exists and the implications of whether it exists or not constitute some of the longest running debates of philosophy.